JPS6143011A - Thickness-shear crystal resonator and its manufacture - Google Patents

Abstract

PURPOSE:To obtain a low cost crystal resonator by providing an opening to a frame holding the crystal resonator, and coating the frame with an insulating resin and an air-tight resin. CONSTITUTION:A crystal oscillating chip 9 having an exciting electrode 10 and a connection electrode 11 and a frame 14 formed with a plastic or a resin having an opening surrounding the chip 9 are provided. Two leads 13 connected to the electrode 11 are penetrated through the frame 14 and the terminal 13 and the electrode 11 are fixed by a conductive member 12. Further, the peripheral face of the frame 14 is coated by the insulating resin 15 including the opening and then coated by the air-tight resin 16. Since the frame and sealing member are formed by a resin or a plastic in this way, the material cost is low, then the crystal resonator with low cost is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to the structure and manufacturing method of a thickness-stretching crystal resonator.

[Prior art]

In the structure of a conventional thickness-stretching crystal resonator, a crystal oscillation piece 2 having an excitation electrode 3 and a connection electrode 4 on its main surface as shown in FIG. 1 is formed into a coil shape at one end and a lead terminal at the other end. The lead terminal 7 passes through the stem 8, and the crystal oscillator piece 2 is held by the conductive adhesive 5 on the coiled part of the tip of the holding member 6 welded to the holder 6.・It was sealed using methods such as resistance welding and cold welding, and was kept in a nitrogen vacuum and nitrogen.

In addition, a front view for explaining the conventional manufacturing method of a thickness-stretching crystal resonator is shown in Figure 2.
This is a front view of the step of forming the excitation electrode and the connection electrode 4 on the main surface of the crystal oscillation piece 2. FIG. The process of preparing a coil-shaped end in the opposite direction,
In the top view, (0) shows the step of holding the coil-shaped part so as to be in contact with the connection electrode 4 formed on the crystal oscillation piece 2 and fixing it to the coil-shaped part with the conductive adhesive 5. Figure ('D) is a front view of the process of sealing the stem 8 and the case 1≧ using methods such as soldering, resistance welding, cold welding, etc., and was characterized by the above process. .

In this way, conventional methods use soldering, resistance welding, cold welding, etc. as a sealing method, which fixes the material of the stem, case, etc., which increases the cost of materials, and the sealing process is a single process, making it a batch process. In addition, there are problems such as inability to process, and the process is complicated, resulting in poor workability and increased man-hours, resulting in a high unit cost of the vibrator.

〔the purpose〕

The present invention is intended to solve these problems, and its purpose is to provide a low-cost vibrator structure and manufacturing method.

〔overview〕

(1) The crystal resonator of the present invention comprises: a crystal oscillation piece having an excitation electrode and a connection electrode on its main surface; a frame surrounding the crystal oscillation piece and having an opening in at least one direction; At least two electrodes connected to the connecting electrode on the oscillating piece and penetrating the frame.
The present invention is characterized by the above-described configuration of a book lead terminal, an insulating resin that covers the outer peripheral surface of the frame including the opening, and an airtight resin that covers the outer periphery of the insulating resin.

(2) The method for manufacturing a crystal resonator of the present invention includes the steps of forming an excitation electrode and a connection electrode on the main surface of a crystal oscillation piece, and forming a frame body surrounding the crystal oscillation piece and having an opening in at least one direction. A step of penetrating at least two lead terminals, a step of housing the crystal oscillator piece in the frame and collecting the lead terminals and the connection electrode, and a step of inserting a heat-meltable or A step of filling a solid phase material with sublimation property, and covering the frame and the surroundings of the same phase body with an insulating resin having sufficient porosity to absorb or allow the same phase body to pass through the tube, and applying heat to form the solid phase body. a step of solidifying the insulating resin and simultaneously absorbing the solid phase into the insulating resin, or passing the solid phase through the insulating resin and discharging the solid phase out of the insulating resin; The method is characterized by comprising the steps described above, including the step of coating the outside with a quick-drying airtight resin.

〔Example〕

Hereinafter, the present invention will be explained in detail based on examples. FIG. 5 is a plan view and a side view of a thickness-stretching crystal resonator according to an embodiment of the present invention. In the figure, the thickness-stretching crystal resonator of this example has an excitation electrode 10 and a connection electrode 1) on the main surface.
A frame body 14 made of glass, plastic, and resin has an opening that surrounds the crystal oscillation piece 9 and a frame body 14 that is connected to the connection electrode 1). Two lead terminals 15 pass through the terminal, and the ends of the lead terminals 13 inside the frame 14 and the connection electrode 1) are fixed with a conductive part @12 such as solder or conductive adhesive. There is. Further, the outer peripheral surface of the frame 14 including the opening is covered with a porous insulating resin 15 of phenolic and epoxy type, and the insulating resin 15 is formed of a porous resin and has low airtightness. Since moisture resistance and weather resistance are low, the outside of the insulating resin 15 is coated with a quick-drying airtight resin 16.

FIGS. 4(A) to 4(F) are front views for explaining the manufacturing process as an example of the present invention. Same figure (1))~
(F) is a side sectional view, (A) is a front view of the step of forming the excitation electrode 10 and the connection electrode 1) on the main surface of the crystal oscillation piece 9, and (B) is a side view of the crystal oscillation piece 9. This is a front view of the process of passing two lead terminals 13 through a frame body 14 made of glass, plastic, or resin that has an opening surrounding the oscillation piece 9. FIG. This figure is a front view of the process of placing the crystal oscillation piece 9 inside and fixing the lead terminal 16 and the connection electrode 1) with a conductive member 12 such as a conductive adhesive. This is a side view of the process of filling the solid phase material 17 with heat-soluble or sublimable properties for forming voids, such as paraffin or naphthalene, into the interior of the material 14. The frame body and the solid phase body are immersed in an insulating paint in which a resin is dissolved in a solvent, and the adhered insulating paint is cured by heating to form the insulating resin 15. The solid phase material 17 such as paraffin or naphthalene is dissolved or sublimated, and the solid phase material absorbed or sublimated into the porous insulating resin 15 is passed through the insulating resin 15 to form the insulating material. ″′ffi″JiJPtt1.
-1i・mb! This figure (F) is a side view of the step of forming a void in the 1laK17o" portion. Since the insulating resin 15 is made of porous resin, it has low airtightness and low moisture resistance and weather resistance. It is a side view of the process of coating the quick-drying airtight resin 16 on top.

The frame body 14 protects the crystal oscillation piece 9 because the crystal oscillation piece 9 is fragile, and the crystal oscillation piece 9 has a property that its characteristics deteriorate when the surroundings are held, so a sufficient amount is required. This has the effect of forming voids.

Further, in this example, the frame body 14 has a box shape, but other shapes such as a circular or elliptical structure as shown in FIGS. 5(A) to 5(B) can also have the same effect.

In this example, the crystal oscillation piece 9 is assumed to be circular, but a rectangular crystal oscillation piece as shown in FIG. 6, for example, may have the same effect.

〔effect〕

As described above, the present invention has the following disadvantages: (1) The frame and the sealing material are made of resin or plastic, so the material cost is low; (2) The characteristics of the crystal oscillation piece deteriorate when the surroundings are held. However, since it is formed naturally by heat treatment of the ninth cavity female frame body and the solid phase body excited by the crystal oscillation piece, the sealing process becomes a simple process and has the effect that a patch process can be performed and the number of man-hours can be reduced.

' In other words, the structure and manufacturing method of the thickness-stretching crystal resonator of the present invention has the effect that it is possible to produce a low-cost crystal resonator.

[Brief explanation of drawings]

Figure 1 is a structural diagram of a conventional thickness-stretching crystal resonator. FIGS. 2(A) to 2(D) are manufacturing process diagrams of conventional thick hill crystal resonators. 51st;! J(A) is a plan view of the thickness-stretching crystal resonator of the present invention, and FIG. 6(B) is a structural diagram showing a side view. FIG. 4 (Δ) to (P) are one-step manufacturing process diagrams of the thickness-stretching crystal resonator of the present invention. FIGS. 5(A) and 5(B) are diagrams showing specific examples of the frame shape in the present invention. FIG. 6 is a perspective view of a thickness-stretching crystal resonator of the present invention in which the crystal oscillation piece is rectangular. 1... Case 2... Crystal oscillation piece 6... Excitation electrode 4... Connection electrode 5... Conductive adhesive 6... Holding member 7... Lead terminal 8... Stem 9 ... Crystal oscillation piece 10 ... Excitation electrode 1) ... Connection electrode 12 ... Conductive member 15 ... Lead terminal 14 ... Frame 15 ... Insulating resin 16 ... Airtight Resin 17...Solid phase or higher

Claims (2)

[Claims] (1) A crystal oscillation piece having an excitation electrode and a connection electrode on its main surface, a frame surrounding the crystal oscillation piece and having an opening in at least one direction, and a frame connected to the connection electrode on the crystal oscillation piece. It is characterized by the above-mentioned configuration, including at least two lead terminals that penetrate the body, an insulating resin that covers the outer peripheral surface of the frame including the opening, and an airtight resin that covers the outer periphery of the insulating resin. A thick crystal resonator. (2) Forming an excitation electrode and a connection electrode on the main surface of the crystal oscillation piece, and passing at least two lead terminals through a frame that surrounds the crystal oscillation piece and has an opening in at least one direction. a step of housing the crystal oscillation piece in the frame and fixing the lead terminal and the connection electrode; and a step of filling the frame with a heat-soluble or sublimable solid phase material for forming voids. , the frame and the solid phase body are covered with an insulating resin having sufficient porosity to absorb or pass the solid phase body, heat is applied to harden the insulating resin, and at the same time the solid phase body is a step of absorbing the body into the insulating resin or passing the solid phase through the insulating resin and discharging it outside the insulating resin; and an airtight resin having quick-drying properties outside the insulating resin 1. A method for manufacturing a thickness-stripping crystal resonator, comprising the steps of: